Cadillac 60 Series 1963 Shop Manual page 127

6-34
HYDRA-MATIC TRANSMISSION
Neutral Clutch Plate
(Composition-Drive)
Rear Unit Sprag
Outer Race
(Neutral Clutch Hub)
Fig. 6-58 Installing Neutral Clutch Drum
Also install five wave type clutch release springs,
one with each composition plate, Fig. 6-58.
27. Install inner and outer neutral clutch piston
oil seals with lips facing down, Fig. 6-48.
28. Install neutral clutch piston into center
bearing support, indexing dowel holes with pins
in piston. Compress outer piston seal into bore,
using care not to damage seals during installation.
29. Install two oil seal rings on center bearing
support, Fig. 6-48.
NOTE: When servicing neutral clutch, if
Clutch
Retainer
J-6135
Cup Plug
Neutral
Clutch Drum
Key Slot
Neutral Clutch
Plate Slot
Fig. 6-59 Alignment of Center Bearing
Support and Neutral Clutch Drum
neutral clutch drum, neutral clutch plates, case
center support or transmission case were re-
placed, a new service neutral clutch piston
must be installed, except where thinnest piston
is already in transmission.
Thinnest production piston and service piston
are identified by a number 3 stamped in relief
on face of piston. Pistons numbered 4, 5, or 6
are thicker and could cause clutch plates to
burn up if used with other parts.
30. Install center bearing support into neutral
clutch drum.
31. Install interlocking oil seal ring on inter-
mediate shaft.
32. Rotate center bearing support so that right
hand edge of cup plug in edge of center bearing
support is aligned with left edge of first neutral
clutch plate slot to right of neutral clutch drum
key slot, as shown in Fig. 6-59.
33. Install Clutch Retainer, J-6135, over in-
termediate shaft by compressing center bearing
support assembly into neutral clutch drum and
tightening lock screw on Clutch Retainer, Fig.
6-59.
CAUTION: Lock screw on Clutch Retainer
should be farthest away from center bearing
support assembly and screw must be withdrawn
far enough so as not to score intermediate shaft
during installation.
34. Mark near drum to indicate alignment of
neutral clutch drum key slot, Fig. 6-59. This will
help guide units into place during installation into
transmission case.
Checking Rear Unit Sun Gear End Play
It is very important at this stage in the assem-
bly of the transmission to check the amount of
rear unit end play. This check is very critical
because, if there is too much clearance, integral
components may become mispositioned and noise
will result. If clearance is insufficient, there will
be too much preload on the washer resulting in
failure in the rear unit.
To check end play, proceed as follows:
1. Place complete rear unit assembly in Hold-
ing Fixture, J-6116, output shaft up.
2. Position overrun band around rear unit drum
to provide a holding fixture for Dial Indicator
Support Rod, J-6126.
3. Place Dial Indicator Support Rod between
ends of band and secure band and Rod to drum,
Fig. 6-60.